US10690693B2 - Sensor comprising an integrated identification device - Google Patents

Sensor comprising an integrated identification device Download PDF

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US10690693B2
US10690693B2 US15/103,408 US201415103408A US10690693B2 US 10690693 B2 US10690693 B2 US 10690693B2 US 201415103408 A US201415103408 A US 201415103408A US 10690693 B2 US10690693 B2 US 10690693B2
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sensor
electronic
identification device
signal processing
processing circuit
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US20160305976A1 (en
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Abtin Darvish
Ralf Endres
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Continental Teves AG and Co OHG
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Continental Teves AG and Co OHG
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Assigned to CONTINENTAL TEVES AG & CO. OHG reassignment CONTINENTAL TEVES AG & CO. OHG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DARVISH, ABTIN, ENDRES, RALF, DR.
Assigned to CONTINENTAL TEVES AG & CO. OHG reassignment CONTINENTAL TEVES AG & CO. OHG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DARVISH, ABTIN, ENDRES, RALF, DR.
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general

Definitions

  • the invention relates to a sensor comprising at least one sensor element, at least one signal processing circuit and at least one package that contains the sensor element and the signal processing circuit.
  • sensors In the automotive sector, great demands are placed on sensors, particularly with respect to fail-safety and trackability of the individual sensors.
  • sensors it is possible to cite wheel speed sensors, the output signals from which are used for various driving dynamics controllers, such as ABS, ASR or ESP, for example.
  • An aspect of the invention is based on proposing an improved sensor, particularly a sensor that allows better quality and/or reliability monitoring and/or evaluation.
  • the identification device comprises at least one data memory unit in which particularly at least one identification datum is storable or stored. Particularly preferably, every sensor on a production run is therefore provided with a univocal identification index or a univocal identification identifier.
  • An identification datum is expediently understood to mean the singular of identification data.
  • the senor has a data transmission interface that comprises particularly a data transmission line or a wireless data transmission unit and also comprises particularly at least one interface signal processing unit.
  • the interface signal processing unit particularly preferably has at least one voltage or current source that is used to produce and provide output signals from the sensor. Quite particularly preferably, the interface signal processing unit comprises multiple current sources that are used to produce an output signal from the sensor that is defined or formed by an impressed current signal having multiple levels.
  • the data transmission interface prefferably be in a form such that it can transmit the at least one identification datum to an external electronic device.
  • the data transmission interface prefferably be in a form such that it can receive the at least one identification datum from an external electronic device and can store it in the data memory unit of the identification device.
  • the external electronic device is preferably understood to mean an external computer unit, particularly comprising a database, to which specific data or information from the sensor are/is transmitted from the sensor and that then transmits an identification datum, which is expediently generated in the database, to the sensor and stores it therein.
  • the identification datum is univocal for a billion sensors, for example.
  • the at least one sensor element of the sensor is preferably in the form of a magnetic field sensor element, particularly in the form of a Hall element or magnetoresistive sensor element, such as an AMR sensor element or a GMR sensor element, for example.
  • the identification device prefferably in a form such that it comprises and/or stores and/or provides at least one essentially unique self-identification datum for this sensor as an electronic apparatus and/or a type identification datum for the sensor, which has at least one piece of information about the specification of the sensor type with which this sensor is associated as an electronic apparatus, as an identification datum in the or its at least one data memory unit.
  • the signal processing circuit and the electronic identification device and also particularly the at least one sensor element are integrated in at least one electronic component, particularly in the form of an ASIC.
  • the self-identification datum and/or type identification datum of the sensor in this case comprises, by way of example, a wafer batch number and/or a piece of information about the ASIC coordinates on the wafer, based on the common electronic component or the ASIC.
  • these pieces of information or data are transmitted from the sensor to the external electronic device during or before or after manufacture of the sensor, after which an, in particular univocal, identification datum of the respective sensor is generated in the external electronic device, particularly in the database thereof, and is then transmitted from the external electronic device to the sensor and is stored in the data memory unit of the identification device of the sensor.
  • the senor prefferably comprises a leadframe to which the signal processing circuit, the sensor element and the identification device are electrically and mechanically connected, particularly for the signal processing circuit, the sensor element and the identification device to be integrated in a single common electronic component, wherein the signal processing circuit, the sensor element and the identification device or the common electronic component and the leadframe are embedded at least to some extent in a plastic package and wherein the leadframe is electrically and mechanically connectable or connected to a connector or a cable.
  • the sensor preferably has a single plastic package.
  • the senor prefferably in the form of a wheel speed sensor.
  • An aspect of the invention relates moreover to the use of the sensor in motor vehicles.
  • the invention relates moreover to a method of manufacture or to a method of programming as part of a method of manufacture for the sensor, particularly by means of an external electronic device, particularly comprising a database, wherein the external electronic device is expediently connected to the interface signal processing unit of the sensor, particularly preferably by means of a cable.
  • FIG. 1 shows an exemplary embodiment of a sensor.
  • FIG. 1 illustrates an exemplary sensor that has leadframe 7 , with mounting island 9 on which a common electronic component 6 , in the form of an ASIC, is arranged.
  • the ASIC 6 has a sensor element 1 , for example an AMR sensor element, a signal processing circuit 2 , an identification device 4 and a data transmission interface 5 , jointly integrated on the chip of the ASIC.
  • ASIC 6 is electrically connected to the leadframe 7 by means of bonding wires 8 .
  • ASIC 6 , the mounting island 9 of the leadframe 7 and a portion of the leadframe are injection molded and packaged in a single plastic package 3 .
  • the legs of the leadframe 7 can be used to connect the sensor to an external electronic device, for example comprising a database, by means of a connector or cable in a manner that is not shown.
  • identification device 4 has a data memory unit, not shown, in which at least one identification datum is storable or stored or overwritable.

Abstract

A sensor including at least one sensor element, at least one signal processing circuit, and at least one housing inside which the sensor element and the signal processing circuit are arranged. The sensor further includes an electronic identification device.

Description

CROSS REFERENCE TO RELATED APPLICATIONS
This application is the U.S. National Phase Application of PCT International Application No. PCT/EP2014/071586, filed Oct. 8, 2014, which claims priority to German Patent Application No. 20 2013 011 157.7, filed Dec. 17, 2013, the contents of such application being incorporated by reference herein.
FIELD OF THE INVENTION
The invention relates to a sensor comprising at least one sensor element, at least one signal processing circuit and at least one package that contains the sensor element and the signal processing circuit.
BACKGROUND OF THE INVENTION
In the automotive sector, great demands are placed on sensors, particularly with respect to fail-safety and trackability of the individual sensors. As an example of such sensors, it is possible to cite wheel speed sensors, the output signals from which are used for various driving dynamics controllers, such as ABS, ASR or ESP, for example.
SUMMARY OF THE INVENTION
An aspect of the invention is based on proposing an improved sensor, particularly a sensor that allows better quality and/or reliability monitoring and/or evaluation.
It is preferred for the identification device to comprise at least one data memory unit in which particularly at least one identification datum is storable or stored. Particularly preferably, every sensor on a production run is therefore provided with a univocal identification index or a univocal identification identifier.
An identification datum is expediently understood to mean the singular of identification data.
It is expedient that the sensor has a data transmission interface that comprises particularly a data transmission line or a wireless data transmission unit and also comprises particularly at least one interface signal processing unit. The interface signal processing unit particularly preferably has at least one voltage or current source that is used to produce and provide output signals from the sensor. Quite particularly preferably, the interface signal processing unit comprises multiple current sources that are used to produce an output signal from the sensor that is defined or formed by an impressed current signal having multiple levels.
It is preferred for the data transmission interface to be in a form such that it can transmit the at least one identification datum to an external electronic device.
It is expedient for the data transmission interface to be in a form such that it can receive the at least one identification datum from an external electronic device and can store it in the data memory unit of the identification device.
The external electronic device is preferably understood to mean an external computer unit, particularly comprising a database, to which specific data or information from the sensor are/is transmitted from the sensor and that then transmits an identification datum, which is expediently generated in the database, to the sensor and stores it therein. In this case, the identification datum is univocal for a billion sensors, for example.
The at least one sensor element of the sensor is preferably in the form of a magnetic field sensor element, particularly in the form of a Hall element or magnetoresistive sensor element, such as an AMR sensor element or a GMR sensor element, for example.
It is preferred for the identification device to be in a form such that it comprises and/or stores and/or provides at least one essentially unique self-identification datum for this sensor as an electronic apparatus and/or a type identification datum for the sensor, which has at least one piece of information about the specification of the sensor type with which this sensor is associated as an electronic apparatus, as an identification datum in the or its at least one data memory unit.
It is preferred for the signal processing circuit and the electronic identification device and also particularly the at least one sensor element to be integrated in at least one electronic component, particularly in the form of an ASIC.
Expediently, the self-identification datum and/or type identification datum of the sensor in this case comprises, by way of example, a wafer batch number and/or a piece of information about the ASIC coordinates on the wafer, based on the common electronic component or the ASIC. Particularly preferably, one or both of these pieces of information or data, for example the wafer batch number and/or the piece of information about the ASIC coordinates, are transmitted from the sensor to the external electronic device during or before or after manufacture of the sensor, after which an, in particular univocal, identification datum of the respective sensor is generated in the external electronic device, particularly in the database thereof, and is then transmitted from the external electronic device to the sensor and is stored in the data memory unit of the identification device of the sensor.
It is expedient for the sensor to comprise a leadframe to which the signal processing circuit, the sensor element and the identification device are electrically and mechanically connected, particularly for the signal processing circuit, the sensor element and the identification device to be integrated in a single common electronic component, wherein the signal processing circuit, the sensor element and the identification device or the common electronic component and the leadframe are embedded at least to some extent in a plastic package and wherein the leadframe is electrically and mechanically connectable or connected to a connector or a cable.
The sensor preferably has a single plastic package.
It is preferred for the sensor to be in the form of a wheel speed sensor.
An aspect of the invention relates moreover to the use of the sensor in motor vehicles.
Furthermore, the invention relates moreover to a method of manufacture or to a method of programming as part of a method of manufacture for the sensor, particularly by means of an external electronic device, particularly comprising a database, wherein the external electronic device is expediently connected to the interface signal processing unit of the sensor, particularly preferably by means of a cable.
BRIEF DESCRIPTION OF THE DRAWINGS
Further preferred embodiments will emerge from the subclaims and the description of an exemplary embodiment below with reference to a FIGURE.
In a schematic illustration,
FIG. 1 shows an exemplary embodiment of a sensor.
 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 1 illustrates an exemplary sensor that has leadframe 7, with mounting island 9 on which a common electronic component 6, in the form of an ASIC, is arranged. The ASIC 6 has a sensor element 1, for example an AMR sensor element, a signal processing circuit 2, an identification device 4 and a data transmission interface 5, jointly integrated on the chip of the ASIC. ASIC 6 is electrically connected to the leadframe 7 by means of bonding wires 8. ASIC 6, the mounting island 9 of the leadframe 7 and a portion of the leadframe are injection molded and packaged in a single plastic package 3. The legs of the leadframe 7 can be used to connect the sensor to an external electronic device, for example comprising a database, by means of a connector or cable in a manner that is not shown. According to the example, identification device 4 has a data memory unit, not shown, in which at least one identification datum is storable or stored or overwritable.
LIST OF REFERENCE SYMBOLS
1 sensor element
2 signal processing circuit
3 package
4 identification device
5 data transmission interface
6 common electronic component or ASIC
7 leadframe
8 bonding wires
9 mounting island

Claims (9)

The invention claimed is:
1. A sensor comprising:
at least one magnetic field sensor element configured to sense a magnetic field,
at least one signal processing circuit connected to receive and process a signal from the at least one magnetic field sensor element, and
at least one package that contains the at least one magnetic field sensor element and the at least one signal processing circuit, wherein
the sensor has an electronic identification device and a data transmission interface that comprises a data transmission line or a wireless data transmission unit, the electronic identification device configured to receive an at least one identification datum from an external electronic device via the data transmission interface and store the at least one identification datum in a data memory unit of the electronic identification device, and
the sensor has a leadframe to which the at least one signal processing circuit, the at least one magnetic field sensor element and the electronic identification device are electrically and mechanically connected, the electronic identification device configured to communicate with the external electronic device via the leadframe.
2. The sensor as claimed in claim 1, wherein the data transmission interface is in a form such that it can transmit the at least one identification datum to an external electronic device.
3. The sensor as claimed in claim 1, wherein the electronic identification device is in a form such that it comprises and/or stores and/or provides
at least one essentially unique self-identification datum for the sensor as an electronic apparatus
and/or
a type identification datum for the sensor, which has at least one piece of information about a specification of the sensor type with which the sensor is associated as an electronic apparatus,
as the at least one identification datum in the at least one data memory unit.
4. The sensor as claimed in claim 1, wherein the at least one signal processing circuit and the electronic identification device and the at least one sensor element are integrated in at least one electronic component.
5. The sensor as claimed in claim 1, wherein the at least one signal processing circuit, the at least one sensor element, the electronic identification device and the leadframe are embedded at least to some extent in a plastic package and wherein the leadframe is electrically and mechanically connectable or connected to a connector or a cable.
6. The sensor as claimed in claim 5, wherein the sensor has a single plastic package.
7. The sensor as claimed in claim 1, wherein the sensor is in the form of a wheel speed sensor.
8. The sensor as claimed in claim 4, wherein the at least one electronic component is in the form of an ASIC.
9. The sensor as claimed in claim 5, wherein the at least one signal processing circuit, the at least one sensor element and the electronic identification device are integrated in a single common electronic component.
US15/103,408 2013-12-17 2014-10-08 Sensor comprising an integrated identification device Active US10690693B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202013011157 2013-12-17
DE202013011157.7 2013-12-17
DE202013011157.7U DE202013011157U1 (en) 2013-12-17 2013-12-17 Sensor with integrated identification device
PCT/EP2014/071586 WO2015090663A1 (en) 2013-12-17 2014-10-08 Sensor comprising an integrated identification device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014015129A1 (en) * 2014-10-14 2016-04-14 Wabco Gmbh Method for identifying a sensor device for speed measurement, sensor device for speed measurement and vehicle with at least one sensor device for speed measurement
DE102019115397A1 (en) * 2019-06-06 2020-12-10 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Wheel speed sensor for a commercial vehicle

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DE202013011157U1 (en) 2014-02-19
WO2015090663A1 (en) 2015-06-25
EP3084358A1 (en) 2016-10-26

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